For the cortex, neuron loss may be less than thought

Article Abstract:

Some research indicates that few cortical neurons than commonly believed are lost during aging, although many experts doubt the findings. If large numbers of neurons do survive, drugs designed to increase neural function could delay the onset of mental deficits.

Aging, Physiological aspects, Nervous system, Cerebral cortex, Nerve degeneration

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Protein sculptors that help turn on genes

Article Abstract:

The design of DNA is dictated by specific proteins called architectural proteins, as they are responsible for the three-dimensional shapes of DNA. The proteins need other proteins to activate genes for specific functions or development.

Gene expression, DNA binding proteins, Chromosomal proteins

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Getting the brain's attention

Article Abstract:

New data on dopamine indicate that brain neurons release the neurotransmitter in response to significant stimuli, rather than to signal pleasure. In this new view, dopamine helps an animal to recognize and repeat stimulating events.

Dopamine, Neurotransmitters, Reward (Psychology), Rewards (Psychology)

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